TIG 오비탈 용접의 위보기 및 경사상진자세에서 용융지 제어 방법에 관한 연구
- Alternative Title
- A study on control method of molten pool in overhead and inclined-up position of TIG orbital welding.
- Abstract
- Due to excellent weld quality, orbital welding with TIG is widely applied to pipe welding. But concave back bead is formed easily in overhead and inclined-up position of butt orbital welding. It is difficult to find a paper to overcome this problum. In this study, in order to make convex back bead in overhead and inclined-up position of pipe 5G welding, control method of molten pool was actively investigated. Melt run welding was conducted on thickness 4.0mm SS400 with overhead and inclined-up position, the welds were observed the variation of bead shape after welding with the bead former developed in this study. The height of back bead showed the trend of increase as the distance from molten pool to the bead former was decreased. Also, there is no trend in the bead width of front and back as welding position was changed or the distance from molten pool to the bead former was decreased.
- Issued Date
- 2010
- Awarded Date
- 2010. 2
- Type
- Dissertation
- Publisher
- 부경대학교
- Alternative Author(s)
- Ha, Jong Moon
- Affiliation
- 부경대학교 대학원 소재프로세스공학과
- Department
- 대학원 소재프로세스공학과
- Advisor
- 조상명
- Table Of Contents
- Abstract ············································································ 1
제 1 장 서 론 ······································································ 2
1.1 연구 배경 및 필요성 ························································ 2
1.2 연구목적 및 개요 ···························································· 3
제 2 장 이론적 배경 ······························································ 4
2.1 TIG 용접 프로세스 ························································· 4
2.1.1 TIG 용접의 정의 ························································· 5
2.1.2 TIG 용접의 원리 ························································· 5
2.2 용접의 아크 물리학 ························································· 6
2.2.1 용접의 아크 특성 ························································· 6
2.2.2 전극 형상에 따른 아크압력 분포특성 ································· 10
2.3 TIG 용접과 플라즈마 용접의 비교 ····································· 11
2.4 실드 가스력의 측정 방법에 관한 연구 동향 ··························· 13
2.4.1 아크압력과 실드가스압력 정의 ·········································· 14
2.4.2 아크압력과 실드 가스압력 측정 결과 ·································· 15
2.5 플라즈마 용접에서 실드 가스력을 이용한 용융지 제어에 관한 연구 동향 ·········· 17
2.5.1 파일럿 가스가 이면비드 볼록 정도에 미치는 영향 ·················· 17
2.5.2 실드 가스가 이면비드 볼록 정도에 미치는 영향 ····················· 18
2.6 오비탈 용접의 원리 ······················································ 19
2.6.1 오비탈 용접의 정의 ··················································· 19
2.6.2 오비탈 용접의 위치 정의 ·············································· 20 2.6.3 오비탈 용접의 각 위치별 용접 특성 ································· 21
제 3 장 실드 가스력을 이용한 용융지 제어 실험 ·························· 25
3.1 서언 ········································································ 25
3.2 실험 재료 및 방법 ······················································· 25
3.2.1 실험 재료 ······························································ 25
3.2.2 실험 방법 ······························································ 26
3.3 실험 결과 및 고찰 ······················································· 30
3.3.1 위보기 및 경사상진자세의 실드가스력 적용 실험결과 ·············· 30
3.3.2 실드가스 압력이 아크전압에 미치는 영향 ···························· 32
3.3.3 실드가스 압력이 표면비드 폭과 이면비드 높이에 미치는 영향 ···· 34
3.4 결언 ········································································· 38
제 4 장 비드 성형기를 이용한 용융지 제어 실험 ·························· 39
4.1 서언 ········································································ 39
4.2 실험 재료 및 방법 ························································ 39
4.2.1 실험 재료 ······························································· 39
4.2.2 실험 방법 ······························································· 40
4.3 실험 결과 및 고찰 ························································ 43
4.3.1 위보기 및 경사상진자세의 비드 성형기 적용 실험결과 ·············43
4.3.2 용접자세가 이면비드에 미치는 영향 ·································· 48
4.3.3 비드 성형기 접촉부 폭이 이면비드 형성에 미치는 영향 ··········· 52
4.4 비드 성형기와 가스력을 이용한 이면비드 성형에 관한 비교 고찰 ····· 55
4.5 결언 ·········································································· 56
제 5 장 결론 ···································································· 57
참고문헌 ········································································· 58
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